上流プロジェクト"system-library-update"の#5が実行　
元の原因: 
ユーザーjfutが実行
ビルドします。 ワークスペース: /home/services/jenkins/jobs/system-library-update/workspace/jdk/JDK-1.6
Unpacking <a href='http://archive.apache.org/dist/ant/binaries/apache-ant-1.8.4-bin.zip'>http://archive.apache.org/dist/ant/binaries/apache-ant-1.8.4-bin.zip</a> to /home/services/jenkins/tools/hudson.tasks.Ant_AntInstallation/LATEST_ANT on Jenkins
FATAL: Unable to find build script at /home/services/jenkins/jobs/system-library-update/workspace/jdk/JDK-1.6/build.xml
Build step 'Antの呼び出し' marked build as failure
Finished: FAILURE